27643821451 has 8 divisors (see below), whose sum is σ = 27671346864. Its totient is φ = 27616314240.

The previous prime is 27643821389. The next prime is 27643821479. The reversal of 27643821451 is 15412834672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27643821451 - 2¹³ = 27643813259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27643821398 and 27643821407.

It is not an unprimeable number, because it can be changed into a prime (27643821481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8198796 + ... + 8202166.

It is an arithmetic number, because the mean of its divisors is an integer number (3458918358).

Almost surely, 2^27643821451 is an apocalyptic number.

27643821451 is a deficient number, since it is larger than the sum of its proper divisors (27525413).

27643821451 is a wasteful number, since it uses less digits than its factorization.

27643821451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9101.

The product of its digits is 322560, while the sum is 43.

The spelling of 27643821451 in words is "twenty-seven billion, six hundred forty-three million, eight hundred twenty-one thousand, four hundred fifty-one".